    package demo4;

    public class Duck extends Animal implements ISwimming,IRunning,IFly{


        public Duck(String name, int age) {
            super(name, age);
        }

        @Override
        public void eat() {
            System.out.println(this.name + "正在吃鸭粮");
        }

        @Override
        public void fly() {

            System.out.println(this.name + "正在飞");
        }

        @Override
        public void swim() {

            System.out.println(this.name + "正在游泳");
        }

        @Override
        public void run() {
            System.out.println(this.name + "正在跑");
        }
    }
